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COOLING SYSTEM TESTER METHOD WARNING: WITH COOLING SYSTEM TESTER IN PRESSURE BUILT UP, BY CONTINUOUS ENGINE OPERATION, MUST BE RELEASED TO A Install Cooling System Tester 7700 or equivalent to pressure cap neck. Start the engine and observe the CHEMICAL TEST METHOD Combustion leaks into the cooling system can also be checked by using Bloc-Chek Kit C-3685-A or REMOVAL - CYLINDER HEAD (1) Perform fuel system pressure release procedure before attempting any repairs. (Refer to 14 - (2) Disconnect battery negative cable. STANDARD PROCEDURE) (4) Remove air filter housing and inlet tube. inder head. (7) Disconnect radiator upper and heater supply hoses from water outlet connections. (8) Remove accessory drive belts. (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL) (9) Raise vehicle and remove exhaust pipe from manifold. (10) Remove power steering pump and set aside. Do not disconnect lines. (11) Remove accessory drive bracket ing connectors. (14) Remove timing belt and camshaft sprockets. (Refer to 9 - ENGINE/VALVE TIMING/TIMING (15) Remove timing belt idler pulley and rear tim- ing belt cover. (Refer to 9 - ENGINE/VALVE TIM- BELT / CHAIN COVER(S) - REMOVAL) (16) Remove cylinder head cover. (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL) (17) Remove camshafts (Refer to 9 - ENGINE/ CYLINDER HEAD/CAMSHAFT(S) - REMOVAL). NOTE: Identify rocker arm position to ensure cor- (18) Remove rocker arms. (Refer to 9 - ENGINE/ CYLINDER HEAD/ROCKER ARMS - REMOVAL). (19) Remove cylinder head bolts in REVERSE sequence of tightening. (20) Remove cylinder head from engine block. ENGINE/CYLINDER HEAD - INSPECTION) (Refer CLEANING To ensure engine gasket sealing, proper surface preparation must be performed, especially with the NOTE: Multi-Layer Steel (MLS) head gaskets require Remove all gasket material from cylinder head and block (Refer to 9 - ENGINE - STANDARD PROCE- Clean all engine oil passages. INSPECTION (1) Cylinder head must be flat within 0.1 mm (0.004 in.) (Fig. 8). (2) Inspect camshaft bearing journals for scoring. (3) Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner. Fig. 8 Checking Cylinder Head Flatness 1 - FEELER GAUGE TJ ENGINE 2.4L 9 - 23 CYLINDER HEAD (Continued) |